Filtrete Air Filter 1” Pack for $45.99

Costco.com offers the Filtrete 1” air filter pack for $45.99. This deal includes a $10 manufacturer’s savings valid from September 21 to October 18, 2026, while supplies last. The 8-pack features a MPR 700 and MERV 8 rating, designed to help capture pollen, dust, pet dander, and other particles, outperforming fiberglass and washable filters. The deal is limited to 10 packs per member. The price is competitive for this quality filter, especially with the ongoing manufacturer savings, though it is not the lowest we've seen on similar filters, which sometimes go slightly lower during sales. The deal’s value is moderate given the outperformance and brand reputation, but the discount is effectively about $10 off the regular price.